Ответ:
6z-6=18
6z=18+6
6z=24
z=24÷6
z=4
________
6(4-1)=18
5y+15=10
5y=10-15
5y=-5
y=-5÷5=-1
_________
5(-1+3)=10
6x-21=9
6x=9+21
6x=30
x=30÷6=5
___________
3(2×5-7)=9
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Ответ:
6z-6=18
6z=18+6
6z=24
z=24÷6
z=4
________
6(4-1)=18
5y+15=10
5y=10-15
5y=-5
y=-5÷5=-1
_________
5(-1+3)=10
6x-21=9
6x=9+21
6x=30
x=30÷6=5
___________
3(2×5-7)=9